Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: A trader works on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Pedestrians walk past the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: A trader works on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: The New York Stock Exchange is seen on Wall Street on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.

Dow Jones reaches its highest point since December 2007.

NEW YORK, NY - MAY 01: Traders work on the floor of the New York Stock Exchange on May 1, 2012 in New York City. Following positive news of a rise in U.S. manufacturing activity, The Dow Jones industrial average rose almost 66 points, or 0.5%, to close at 13,279.40, the highest since December 2007.